15+25=
42-4=
36+30=
78-8+6=
5+43=
60-7=
50+34=
87-(40-3)=
①56+29=
②92-78=
③70-37+28=
④100-76=
⑤81-79=
⑥86-(45+26)=
29+23= 2 36-18=8
34+25=9 59-38=1
35+1257 45-855-18 70-625+35
32+4587 6+3460+4 36-936-12